Directly Turning Micro Alloyed Steel Chrome Plated Rods For Construction
Product Description
1. The micro alloy steel products are developed on the basis of proprietary technology of the control
rolling and cooling for substituting quenched and tempered piston rods with a variety of mechanical
performance requirements.
2. The mechanical property is correspond to quenched and tempered piston rods or over them and
very uniform on the whole cross section.
3. Hardness is more uniform on the whole cross section than quenched and tempered piston rods
4. Turning performance is commensurate to quenched and tempered piston rods or be superior to them.
5. Micro alloy steel rod mainly used in mechanical manufacturing for the directly turning part of shaft
and rod, ect
6. The processing period is shortened, and the productivity is enhanced and the occupied capital is
reduced..
7. The processing cost is low, there is no need of quenched and tempered process and the second
turning but the mechanical property is correspond to quenched and tempered piston rod
Detailed Description
1. MATERIAL: HY4700, HY4520
2. CHEMICAL COMPOSITION(%)
| Material | C% | Mn% | Si% | S% | P% | V% | Ni | Cr% | Mo | Cu |
| HY4700 | 0.38-0.45 | 1.20 ~1.60 | 0.30~0.50 | ≤0.035 | ≤0.020 | 0.05～0.15 | ≤0.25 | 0.10～0.20 | ≤0.15 | 0.25 |
| HY4520 | 0.40 ~0.48 | 0.80 ~1.40 | 0.15 ~0.35 | ≤0.035 | ≤0.035 | ≤0.15 | ≤0.25 | ≤0.25 | ≤0.15 | ≤0.25 |
3. MECHANICAL PROPERTIES
| Material | MECHANICAL PROPERTIES | Surface hardness(HBW) |
| Rm(MPa) | Rel(MPa) | A% | Z% | KU2(J) | |
| HY4700 | Φ35 - Φ100 | 900 - 1100 | ≥650 | ≥16 | ≥35 | ≥39 | 270-340 |
| ＞Φ100 - Φ140 | 850 - 950 | ≥600 | ≥16 | ≥35 | ≥39 | 270-340 |
| HY4520 | Φ40 - Φ100 | 750 - 900 | ≥520 | ≥19 | ≥40 | ≥39 | 230-290 |
| ＞Φ100～Φ140 | 750 - 900 | ≥520 | ≥17 | ≥35 | ≥39 | 230-290 |
| | | | | | | | |
4. SUPPLY CONDITION
Ground and chrome plated
5. CHROME THICKNESS
20 to 30 micron
6 .SURFACE HARDNESS
850-1150HV (vickers 100g)
7. STRAIGHTNESS
≤0.2MM/M
8. TOLERANCES ON DIA
ISO f7 on the diameter
9.OVALITY
Half of the tolerance ISO f7
10. SURFACE ROUGHNESS
Ra≤0.2 micron and Rt≤2 micron
11. CORROSION RESISTANCE
Test in natural salt spray according to ASTM B 117-120hours
Results evaluation according to ISO 4540 RATING 7-10
12.POROSITY
Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10
13. WELDABILITY
Good
14. PACKING
Anti rust oil to be applied on material and each rod to be packed in paper sleeve
15. COHESION
No craks,breaking or detaching after thermic shock(warming up at 300 celsius degrees
and cooling in water)
16. CERTIFICATE
All certificate related with material heat treatment and plating is required
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